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epigenesis
[ ep-i-jen-uh-sis ]
noun
- Biology. the theory that an embryo develops from the successive differentiation of an originally undifferentiated structure ( preformation ).
- Genetics. the approximately stepwise process by which genetic information is modified and translated into the substance and behavior of an organism. epigenetics.
- Geology. ore deposition subsequent to the original formation of the enclosing country rock.
epigenesis
/ ɪˈpɪdʒɪnɪst; ˌɛpɪˈdʒɛnɪsɪs /
noun
- the widely accepted theory that an individual animal or plant develops by the gradual differentiation and elaboration of a fertilized egg cell Compare preformation
- the formation or alteration of rocks after the surrounding rock has been formed
- alteration of the mineral composition of a rock by external agents: a type of metamorphism
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Derived Forms
- ˌepiˈgenesist, noun
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Other Words From
- epi·gene·sist e·pig·e·nist [ih-, pij, -, uh, -nist], noun
- ep·i·ge·net·ic [ep-i-j, uh, -, net, -ik], adjective
- epi·ge·neti·cal·ly adverb
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Word History and Origins
Origin of epigenesis1
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